US Bridges

M-115 over Manistee River

Fair

Wexford County, Michigan · 1.0 MI W of Mesick · Structure no. 000000000012574

Built
1949
76 years old, rebuilt 2021
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
179 ft
3 main spans
Daily traffic
4,891
2022 count
Owner
State
State Highway Agency

About this bridge

M-115 over Manistee River is a steel stringer/multi-beam or girder carrying M-115 over Manistee River in Wexford County, Michigan. It was built in 1949 and reconstructed in 2021, so it is 76 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 4,891 vehicles a day, roughly 6% of them trucks. The structure is 179 ft (54.6 m) long and 39 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesM-115
CrossesManistee River
Location1.0 MI W of Mesick
RouteState Highway 115
CountyWexford County
StateMichigan
Coordinates44.40652, -85.7336
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.7 US tons
Inventory rating58.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadGreater than HL 93
Structure length179 ft (54.6 m)
Longest span59 ft (17.9 m)
Deck width39 ft (12 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,891 (2022)
Projected traffic—
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was M-115 over Manistee River built?

It was built in 1949, making it 76 years old in 2025. It was reconstructed in 2021.

What condition is M-115 over Manistee River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2023.

How much traffic does M-115 over Manistee River carry?

About 4,891 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is M-115 over Manistee River?

The structure is 179 ft (54.6 m) long with a longest span of 59 ft (17.9 m) and a deck 39 ft wide.

Who owns M-115 over Manistee River?

It is owned by the State Highway Agency.